1. Centre d’Investigation Clinique 1402 INSERM, Centre Hospitalier Universitaire de Poitiers, Poitiers, France;
2. Pediatric Department, Assistance Publique–Hôpitaux de Paris and University Paris Diderot, Assistance Publique-Hôpital Saint Louis and Robert Debré, Paris, France;
3. Hematology Unit, Hôpital Trousseau, Paris, France;
4. Hematology Unit, Institut d’Hématologie et d’Oncologie Pédiatrique, Hospices Civils de Lyon, Lyon, France;
5. Pediatric Oncology Unit, University Hospital, Lille, France;
6. Pediatric Oncology Unit, University Hospital, Strasbourg, France;
7. Pediatric Oncology Unit, University Hospital, Bordeaux, France;
8. Hematology Department, University Hospital, Brest, France;
9. Hematology Unit, University Hospital, Marseille, France;
10. Pediatric Oncology Unit, University Hospital, Montpellier, France;
11. Hematology Unit, Hôpital Robert Debré, Paris, France;
12. Hematology Unit, University Hospital, Nancy, France;
13. Pediatric Oncology Unit, University Hospital, Rennes, France;
14. Pediatric Oncology Unit, University Hospital, Angers, France;
15. Pediatric Oncology Unit, University Hospital, Dijon, France;
16. Pediatric Oncology Unit, University Hospital, Nantes, France; and
17. Laboratory of Molecular Hematology, University Hospital Saint-Louis, Assistance Publique–Hôpitaux de Paris and EA3518 Unit, University Paris Diderot, Paris, France